WO2004055934A1 - Pile solaire photoelectrochimique - Google Patents

Pile solaire photoelectrochimique Download PDF

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Publication number
WO2004055934A1
WO2004055934A1 PCT/JP2003/015732 JP0315732W WO2004055934A1 WO 2004055934 A1 WO2004055934 A1 WO 2004055934A1 JP 0315732 W JP0315732 W JP 0315732W WO 2004055934 A1 WO2004055934 A1 WO 2004055934A1
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WIPO (PCT)
Prior art keywords
solar cell
photoelectrochemical
photoelectrochemical solar
semiconductor
solar cells
Prior art date
Application number
PCT/JP2003/015732
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English (en)
Japanese (ja)
Inventor
Hideo Otaka
Michie Kira
Kentaro Yano
Shunichiro Ito
Hirofumi Mitekura
Toshio Kawata
Fumio Matsui
Original Assignee
Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo filed Critical Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
Priority to JP2004560614A priority Critical patent/JPWO2004055934A1/ja
Publication of WO2004055934A1 publication Critical patent/WO2004055934A1/fr
Priority to SE0402007A priority patent/SE0402007L/xx
Priority to FI20041076A priority patent/FI20041076A/fi
Priority to NO20045363A priority patent/NO20045363L/no

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M14/00—Electrochemical current or voltage generators not provided for in groups H01M6/00 - H01M12/00; Manufacture thereof
    • H01M14/005—Photoelectrochemical storage cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2004—Light-sensitive devices characterised by the electrolyte, e.g. comprising an organic electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2068—Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/542—Dye sensitized solar cells

Definitions

  • the present invention relates to a photoelectrochemical solar cell, and more particularly to a photoelectrochemical solar cell that displays pictures, characters, and the like by utilizing the difference in the color of a semiconductor electrode. .
  • photovoltaic power has come to the forefront as a clean alternative to thermal and nuclear power.
  • the principle of photovoltaic power generation which generates an electromotive force when a semiconductor is irradiated with light, has been known for a long time, and solar cells utilizing this principle have already been used in single-crystal silicon solar cells and polycrystalline silicon solar cells.
  • Amorphous solar cells, compound semiconductor solar cells, inorganic solar cells, organic solar cells, photoelectrochemical solar cells (wet solar cells), etc. have been devised.
  • some of these solar cells have been put into practical use, and as a light-weight, long-lasting power source, even though their electromotive force is small, they have rapidly spread as simple power generation means in portable devices and households. I am doing it.
  • photoelectrochemical solar cells can form a junction only by bringing a semiconductor into contact with a redox electrolyte, and a relatively high photoelectric conversion efficiency can be expected even if a polycrystalline material is used.
  • solar cells for example, Yoshihiro Hamakawa, Yukinori Kuwano, "Solar Energy Engineering", Baifukan Co., Ltd., published May 20, 1994, pp. 209 to 210).
  • the semiconductor electrode which is one of the main components of the photoelectrochemical solar cell, is usually photosensitized by an organic dye compound having a light absorbing ability, and as a result, the photoelectrochemical solar cell is
  • the color of the organic dye compound carried on the semiconductor electrode can be seen through the cell container, and depending on the field of application, the color limits the application. there were.
  • One of the attempts to turn the drawbacks of photoelectrochemical solar cells into advantages is that the colors of the semiconductor electrodes can be seen through, and the color of the semiconductor electrodes can be changed by appropriately arranging multiple photoelectrochemical solar cells.
  • an object of the present invention is to provide a photoelectrochemical solar cell capable of displaying colorful pictures, characters, and the like, and an application thereof. Disclosure of the invention
  • the present invention provides a photoelectrochemical solar cell using an iodine-based redox electrolyte, wherein the light transmittance of the electrolyte layer at a wavelength of 550 nm is 85% or more. Therefore, the above-mentioned problem is solved.
  • the present invention provides a plurality of such photoelectrochemical solar cells, and displays a desired pattern, character, or the like based on a difference in color of a semiconductor electrode in the plurality of photoelectrochemical solar cells.
  • the object is achieved by providing a battery assembly.
  • the electrolyte layer having a light transmittance of 85% or more at a wavelength of 550 nm is higher in concentration of the iodine-based oxidation-reduction electrolyte than that conventionally used in photoelectrochemical solar cells. Is significantly lower. Even if the iodine-based redox electrolyte, which plays a role in electron transfer, has such a low-concentration electrolyte layer, it is expected that photoelectrochemical solar cells can exhibit photoelectric conversion characteristics that do not hinder practical use. Contrary to this, it was a completely unexpected discovery. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a schematic view of one example of a photoelectrochemical solar cell according to the present invention.
  • FIG. 2 is a schematic diagram of one example of a solar cell assembly according to the present invention. Explanation of reference numerals
  • the photoelectrochemical solar cell as referred to in the present invention means a solar cell including a semiconductor electrode, a counter electrode, an electrolyte layer, and a partially or wholly transparent cell container accommodating them.
  • the present invention does not impose any particular restrictions on the shape and structure of the photoelectrochemical solar cell, in view of its main use as a solar cell assembly such as a solar cell module and a solar cell array, It does not become bulky, and usually is formed in a panel shape.
  • Preferred photoelectrochemical solar cells can be made thinner as a whole, and have high photoelectric conversion efficiency. (Title of Invention "Photosensitive Composition") ⁇ 1> Japanese Patent Application No. 2002-2966757 (Title of Invention "Semiconductor Electrode").
  • FIG. 1 is a schematic view showing an example of a photoelectrochemical solar cell according to the present invention.
  • reference numeral 1 denotes a semiconductor electrode
  • the semiconductor electrode 1 is, for example, transparent to one side of a substrate 1a.
  • Substrate 1a is substantially transparent in the entire visible region, for example, aluminosilicate glass, aluminoborosilicate glass, quartz glass, soda-lime glass, barium silicate glass, barium borosilicate glass, borosilicate glass Or glass, or aramide, polyacrylate, polyarylate, polyimide, polyurethane, polyetherketone, polyethersulfone, polyester, polyethylene, Polyethylene phthalate, polyolefin fin, polycarbonate, polysulfone, polyvinyl chloride, polypropylene, polymethyl acrylate, epoxy resin, phenolic resin, fluorine resin , Melamine-based resins, and other plastics, as well as alumina, silicon, quartz, silicon carbide, etc.
  • aluminosilicate glass aluminoborosilicate glass, quartz glass, soda-lime glass, barium silicate glass, barium borosilicate glass, borosilicate glass Or glass, or aramide
  • substrate material plate sheet-like
  • Preferred substrate materials include, for example, aluminosilicate glass, aluminoborosilicate glass, quartz glass, borosilicate glass, barium borosilicate glass, etc., both having a small alkali content and a small coefficient of thermal expansion.
  • the glass has a smooth surface, has no scratches, is easy to polish, and has excellent compatibility with the glass for photomasks and the adjacent electrically conductive film, and it is difficult to transmit moisture.
  • Examples include phenolic, polyarylate, polyimide, polyester, aromatic polyether, polyolefin, melamine, and fluorine plastics, and ceramic materials such as silicon. Is used in combination with a transparent substrate material. When using a glass with a large aluminum content, such as soda-lime glass, it is desirable to perform a pretreatment to form a film on the surface with silica, for example.
  • the electrically conductive layer 1 b is made of one or more of a metal or an electrically conductive material having an electrical low resistivity and a large light transmittance over the entire visible region.
  • a metal or an electrically conductive material having an electrical low resistivity and a large light transmittance over the entire visible region.
  • vacuum deposition, sputtering, chemical vapor deposition (CVD), atomic layer epitaxy (ALE), coating, immersion, etc. are preferably performed to a thickness of 10 nm or more on one side of the substrate 1a. Is formed by attaching it in a layer of 50 nm or more.
  • the metal and the electrically conductive material in the electrically conductive layer 1b include metals such as gold, platinum, aluminum, and nickel, and oxides mixed with trace amounts of zinc oxide, tin oxide, indium oxide, fluorine, and antimony.
  • Metal oxides such as tin (hereinafter abbreviated as “NESA”) and tin oxide mixed with a small amount of tin (hereinafter abbreviated as “ITO”), as well as aniline, thi-phen, Examples thereof include an electrically conductive oligomer and an electrically conductive polymer having pyrrole or the like as a repeating unit. Of these, NESA coated in a thin film is preferred.
  • the semiconductor layer 1c is usually prepared as an aqueous suspension containing semiconductor nanoparticles having a porous structure with an average particle diameter of 5 to 500 nm, and the suspension is applied by a method such as coating. It can be formed by attaching the conductive layer 1b to a thickness of 0.1 to 100 ⁇ m, preferably 1 to 50 ⁇ m, and then sintering.
  • the semiconductor constituting the semiconductor layer 1 c include compound semiconductors generally used in the art, especially cerium oxide, titanium oxide, zirconium oxide, vanadium oxide, niobium oxide, tungsten oxide, iron oxide, Metal oxides such as nickel oxide, indium oxide, tin oxide and bismuth oxide, and composite metal oxides such as strontium titanate, barium titanate, potassium niobate, and sodium tantalate Substances, metal halides such as tin iodide, copper iodide, and copper bromide, zinc sulfide, titanium sulfide, indium sulfide, bismuth sulfide, cadmium sulfide, zirconium sulfide, tantalum sulfide, and silver sulfide Metal sulfides, such as copper sulfide, copper sulfide, tin sulfide, tungsten sulfide, and molybden
  • the compound semiconductor comprising a group of semiconductor particles having a plurality of peaks in the particle size distribution described in Japanese Patent Application Laid-Open No. 2001-357879, filed by Useful.
  • these semiconductors are merely examples, and the semiconductors used in the present invention are not limited thereto, and may be appropriately selected from p-type semiconductors and n-type semiconductors without departing from the purpose of the invention. You just have to choose one.
  • a molecular weight of 50,000 to 500,000 daltons may be used to increase the surface area of the porous structure in the semiconductor layer. 5 to 50% by mass, preferably 10 to 30% by mass of a water-soluble synthetic polymer such as polyethylene glycol and a water-soluble natural polymer such as pullulan and ercinan based on the semiconductor. % Is desirable.
  • one or a plurality of organic dye compounds having a light-absorbing ability can be used at a concentration of 0.01 mM to a saturation concentration, preferably 0.1 to 0.
  • the solvent is evaporated, and the semiconductor electrode 1 is allowed to carry the organic dye compound.
  • the organic dye compound has a negatively chargeable atomic group. What can be carried on layer 1 c There is no particular limitation as long as the semiconductor layer 1 c can be substantially photosensitized.
  • organic dye compounds those used as photosensitizers in the art include, for example, acridine, azanulene, azo, anthraquinone, indigo, and indance Len, oxazine, xanthene, coumarin, dioxazine, thiazine, thiindigo, tetrapolphyrazine, triphenylmethane, triphenothiazine, naphtho Organic dye compounds of quinone type, phthalocyanine type, benzoquinone type, benzopyran type, benzofuranone type, po, limetine type, porphyrin type, and rhodamine type are mentioned. Used in combination.
  • Preferred organic dye compounds include, for example, coumarin-based organic dye compounds having a negatively chargeable atomic group such as a hydroxyl group, a sulfo group, and a phenolic hydroxyl group, and oxonol.
  • Polymethine-based organic dye compounds including dyes, cyanine dyes, styrene dyes, merocyanine dyes, and rhodanine dyes, are mentioned.
  • the coumarin-based and polymethine-based organic dye compounds disclosed in the specification of No. 21 (title of the invention, "photosensitizing composition") are particularly preferred.
  • the solvent is not particularly limited as long as it is easily evaporated and the organic dye compound is substantially dissolved.
  • Specific solvents include, for example, methanol, ethanol, 2,2,2-triethanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol.
  • Alcohols such as ethanol, isobutyl alcohol, isopentyl alcohol, and cyclohexanol; hydrocarbons such as benzene, toluene, and xylene; acetate bottles; propionitol bottles; Trityls such as synonitrile, ethers such as getyl ether, diisopropyl ether, tetrahydrofuran, tetrahydropyran, 1,4-dioxane Etc. These are used in combination as necessary.
  • solvents alcohols such as methanol and ethanol, alcohols such as methanol, ethanol and the like, and mixtures thereof, because the organic dye compound is easily dissolved and easily evaporated. Is preferred.
  • reference numeral 2 denotes a counter electrode, which is usually applied to one side of the substrate 2a similar to that of the semiconductor electrode 1, for example, general-purpose such as vacuum deposition, chemical vapor deposition, sputtering, atomic layer epitaxy, coating, and immersion.
  • metal such as iron, ruthenium, cobalt, rhodium, nickel, platinum, copper, silver, gold, zinc, aluminum, tin, or similar to carbon or semiconductor electrode 1 It can be obtained by forming the electrically conductive layer 2b by attaching a semiconductor having a thickness of 0.1 nm or more, preferably 10 nm or more, and more preferably 100 nm or more.
  • the photoelectrochemical solar cell of the present invention can be obtained by immersing the thus obtained semiconductor electrode 1 and counter electrode 2 in an electrolyte layer in a cell container.
  • reference numeral 3 denotes its electrolyte layer, which is usually mainly composed of an organic solvent or an ionic liquid, and contains iodine and, if necessary, for example, imidazodium iodide derivatives, lithium iodide, and lithium iodide.
  • An iodine compound such as potassium iodide or tetraalkylammonium iodide is added as an iodine-based redox electrolyte.
  • the amount of the iodine-based redox electrolyte to be added is such that the light transmittance of the electrolyte layer at a wavelength of 550 nm is 85% or more of a control to which the iodine-based redox-electrolyte is not added, preferably 90 to 99. Set to%. If the light transmittance of the electrolyte layer at a wavelength of 550 nm is less than 85%, the color of the semiconductor electrode seen through the cell container becomes dull, and it becomes difficult to obtain a vivid display. Depending on the type of semiconductor or photosensitizer used, if the light transmittance exceeds 99%, the photoelectric conversion efficiency may decrease to a level that causes practical problems. It is desirable to adjust within the range described above.
  • the organic solvent for forming the electrolyte layer 3 is not particularly limited as long as it is easy to handle, stable, and substantially dissolves the iodine-based redox electrolyte.
  • a solvent include, for example, nitriles such as acetonitril, methoxyacetonitrile, propionitol, methoxypropionitol, and succinonitrile; Esters such as ethylene and propylene carbonate, N, N-dimethylformamide, N, N-amides such as dimethylacetamide, hexamethyldiacid, triamide, tetrahydrofuran 1,4-dioxane, dicyclohexyl-18-ethers such as crown-16, amines such as pyridine, nitro compounds such as nitromethane, dimethyl Examples thereof include sulfur-containing compounds such as sulfoxide, and these are used in combination as necessary.
  • Examples of the ionic liquid for forming the electrolyte layer 3 include those commonly used in the art, for example, imidazolium salt, oxazolium salt, sulfonium salt, thiazolium salt, and triazolidium salt. Salt, villazolium salt, pyridium salt, pyridazime salt, pyrimidium salt, phosphonium salt and the like.
  • Examples of the counter ion in the ionic liquid include chloride ion, bromide ion, iodine ion, iodine trimer (I 3 —), sulfate ion, nitrate ion, tetraborate ion, and antimony hexafluoride.
  • Inorganic cations such as acid ion and hexafluorosulfonate ion, thiocyanate ion, tris (trifluoromethanesulfone) carbide ion, trifluromethanesulfonate ion, trifluoromethanesulfonate ion, Organic anions such as bis (trifluromethanesulfonyl) imidion are exemplified, and among them, iodide ion and iodine trimer ion are preferable.
  • a particularly preferred liquid is an imidazole salt represented by the general formula 1.
  • R 1 and R 2 represent the same or different aliphatic hydrocarbon groups.
  • the aliphatic hydrocarbon group for R 1 and R 2 include a C 1 to C 20 group such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a 1-propenyl group, —Propenyl, butyl, isobutyl, sec-butyl, tert —butyl, 3 —butenyl, 1,3-butenyl, pentyl, isopentyl, neopentyl, tert —pentyl , 1 —methylpentyl group, 2 —methylpentyl group, hexyl group, isohexyl, xyl group, 5 —methylhexyl group, heptyl group, octyl group, nonyl group, decyl
  • X in the general formula 1 is a counter ion as described above.
  • a spacer for preventing physical contact between the semiconductor electrode 1 and the counter electrode 2 is not hindered, if necessary.
  • the material of the spacer include polyester, polycarbonate, polysulfone, polymethylpolyacrylate, and polypropylene.
  • Plastics such as pyrene and polyethylene, glass such as quartz, glass, soda-lime glass, aluminosilicate glass, aluminoborosilicate glass, borosilicate glass, barium silicate glass, and barium borosilicate glass, quartz,
  • Non-electrically conductive materials such as ceramics, such as ceramics, may be used alone or in combination as appropriate, with a film thickness of 1 m or more, preferably 10 to 50 m, It is formed into a film or sheet.
  • the spacer can be omitted.
  • the substrates 1a, 2a due to the difference in the refractive index between the atmosphere and the substrates 1a, 2a
  • anti-reflection layers 4a and 4b mainly composed of magnesium fluoride and cryolite
  • photoelectrochemical solar cells to minimize deterioration in the use environment
  • a sealing device such as a sealing glass or metal cap, or a moisture-proof paint is applied, or a UV-curable resin, a thermosetting resin, etc. It is desirable to cover with a protective film.
  • the photoelectrochemical solar cell of the present invention is usually formed by combining a plurality of battery units, for example, a solar cell module, a solar cell array, and other solar cells. Used as a battery assembly.
  • a plurality of photoelectrochemical solar cells as a whole are individually connected while connecting a plurality of photoelectrochemical solar cells according to the present invention in series or in parallel. It can be obtained by arranging so as to display desired pictures, patterns, figures, characters, symbols, etc. according to the difference in the color of the semiconductor electrode.
  • FIG. 2 is a schematic diagram showing one example of a solar cell assembly according to the present invention.
  • 6a, 6b, 6c, and 6d are the photoelectrochemical solar cells of the present invention, which are connected in series with each other by wires 7a, 7b, and 7c.
  • the support member 8 made of a physically tough non-electrically conductive material such as tempered glass, reinforced plastic, etc., respectively, to the photoelectrochemical solar cells 6a, 6b, 6c, 6 It is arranged with the opposite electrode side of d facing. In order to display pictures, characters, etc.
  • the photoelectrochemical solar cells 6a, 6b, 6cs 6d are formed into squares, rectangles, rhombuses, trapezoids, triangles, circles, etc., while the semiconductor electrodes are changed to purple, blue, green, yellow, red, black, etc., depending on the picture, character, etc. to be displayed.
  • the size of the photoelectrochemical solar cells 6a, 6b, 6c, 6d is as follows. For example, while taking into account the type, size, accuracy, etc. If the photoelectrochemical solar cell has a rectangular shape, the length of one side of the photoelectrochemical solar cell should be about 1 mm to 1 m.
  • a solar cell assembly includes a plurality of photoelectrochemical solar cells according to the present invention arranged in columns and rows or rows, and their electrode ends are connected to wires 7a, 7b, and 7c. Connected appropriately in series or parallel with each other as necessary, covered with a moisture-proof sheet such as ethylene vinyl acetate sheet or vinyl fluoride sheet as necessary, and heated under reduced pressure to laminate. After that, it can be mounted on a general-purpose aluminum frame or the like to make a solar cell module. In this case, the colors of the semiconductor electrodes in the photoelectrochemical solar cells constituting each solar cell module may be the same or different in the modules.
  • a solar cell assembly in the form of a solar cell array will display the desired picture, characters, etc. as a whole Needless to say.
  • the photoelectrochemical solar cells are connected in series or in parallel, combining solar cells with similar open-circuit voltage and short-circuit current in terms of stable operation of the solar cell assembly Is desirable.
  • the output of the solar cell assembly exceeds 1 kW, for example, the assembly is separated into multiple blocks from the viewpoint of maintenance, and a breaker, backflow, and prevention die are inserted for each block. It is desirable to do it.
  • the photoelectrochemical solar cell and the aggregate thereof according to the present invention can be advantageously used as a display means having a power generation function in a wide variety of situations requiring display of pictures, characters, and the like. be able to.
  • the solar cell assembly according to the present invention can be attached to an outer wall or a window glass of a company building to display a company name, a company mark, a catch phrase, etc., and the generated power is consumed by the business establishment. It can be used for part of the electricity generated.
  • In vehicles and ships by attaching solar cell assemblies to side walls, ceiling walls, windows, etc., the affiliation, ship name, ship registration, etc.
  • the generated power is, for example, an indicator or display It can be used for lighting.
  • the generated power can be used, for example, as a backup power supply for memory. can do.
  • the solar cell assembly of the present invention When the solar cell assembly of the present invention is used outdoors, for example, by attaching it to a gantry or the like, as in a conventionally known solar cell, the solar cell assembly displays, for example, slogans related to ecology. You may do so.
  • Example 1 Semiconductor electrode
  • NESA is vapor-deposited on one side of a substrate 1a (1.8 mm thick, 1 cm long, 1 cm wide) of soda-lime glass whose surface is treated with silica, and the thickness is 100 nm.
  • the electrically conductive layer 1b was formed.
  • titanium nanoparticles having an average particle diameter of 23 nm and titanium oxide nanoparticles having an average particle diameter of 12 nm were mixed at a mass ratio of 4: 1 to obtain 20% by mass of polyethylene glycol. It is suspended in an aqueous solution, applied to the electrically conductive layer ⁇ b to a thickness of 0.1 nm, dried, and then sintered at 450 ° C. for 30 minutes to form a semiconductor electrode.
  • a polymethine-based organic dye compound represented by Chemical Formula 1 (maximum absorption wavelength: 570 nm) or a polymethine-based organic dye compound represented by Chemical Formula 2 (maximum absorption wavelength: 586 nm) Or a mixture (molar ratio 1: 4) of a polymethine-based organic dye compound represented by Chemical Formula 2 and a coumaran-based organic dye compound represented by Chemical Formula 3 (maximum absorption wavelength: 4 21 nm) and their respective, after dissolving the meta Nord so that the concentration of the organic dye compound is a whole and to 2 X 1 0- 4 M, to each resultant solution obtained in the semiconductor
  • the electrodes were soaked for 10 hours. After that, the semiconductor electrodes were taken out, and allowed to stand at room temperature to evaporate methanol, thereby obtaining three types of photosensitized semiconductor electrodes.
  • a counter electrode having an electric conductive layer having a thickness of 100 nm is formed.
  • An anti-reflection layer made of magnesium fluoride is provided on the side of the semiconductor electrode and the counter electrode that does not have the electric conductive layer.
  • the iodine concentration was 16% by mass.
  • the light transmittance of the electrolyte layer should be more than 80%, specifically, 85% or more, and preferably 9% or more. He says that it is important to make it 0% or more.
  • Example 2 Three types of photoelectrochemical solar cells obtained by the method of Example 2 and having a light transmittance of the electrolyte layer at a wavelength of 550 nm of 90% were obtained. A xenon lamp and a bandpass filter were used as light sources. Using a general-purpose solar simulator (air mass 1.5, illuminance 96,500 Iux, radiant energy density 97 mWZ cm 2 ) that combines was examined. Table 1 shows the results.
  • the solar cell assembly of this example having excellent photoelectric conversion characteristics can be advantageously used indoors and outdoors as a display means having a power generation function.
  • Example 5 Photoelectrochemical solar cell Acetonitrile solution containing 45 mM of iodine, 30 mM of lithium iodide, 330 mM of dimethylhexylmidazolium iodide and 100 mM of 4-tert-butylbutylidine Three types of photoelectrochemical solar cells were produced in the same manner as in Example 2 except that an electrolyte layer composed of the following (a light transmittance at a wavelength of 550 nm of 95%) was used. .
  • All of the photoelectrochemical solar cells of the present example exhibit good photoelectric conversion characteristics, and the semiconductor electrodes are bright blue and green through the substrate on the semiconductor electrode side constituting a part of the cell container. Or it looked red.
  • a solar cell assembly was produced in the same manner as in Example 3, except that three types of photoelectrochemical solar cells produced by the method of Example 5 were used.
  • the photoelectrochemical solar cell and the solar cell assembly according to the present invention can be used as a display means having a power generation function, for example, in a business place, a vehicle, a ship, an electric / mechanical device, or the like. It can be used to advantage in a wide variety of situations where textual display is required.

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Abstract

Pile solaire photoélectrochimique capable d'afficher des motifs et des caractères de couleur lumineuse et ses applications. La pile solaire photoélectrochimique utilise un électrolyte d'oxydation-réduction à base d'iode, la transmittance à une longueur d'onde de 550 nm de l'électrolyte étant d'au moins 85 %. Ses applications impliquent un ensemble pile solaire comprenant une pluralité de piles solaires photoélectrochimiques et affichant des motifs et des caractères désirés au moyen de différentes couleurs d'électrodes à semi-conducteurs dans la pluralité de piles solaires photoélectrochimiques.
PCT/JP2003/015732 2002-12-16 2003-12-09 Pile solaire photoelectrochimique WO2004055934A1 (fr)

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Application Number Priority Date Filing Date Title
JP2004560614A JPWO2004055934A1 (ja) 2002-12-16 2003-12-09 光電気化学太陽電池
SE0402007A SE0402007L (sv) 2002-12-16 2004-08-12 Fotoelektrokemisk solcell
FI20041076A FI20041076A (fi) 2002-12-16 2004-08-12 Valosähkökemiallinen aurinkokenno
NO20045363A NO20045363L (no) 2002-12-16 2004-12-08 Fotoelektrokjemisk solcelle

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JP2002-363360 2002-12-16
JP2002363360 2002-12-16

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WO2004055934A1 true WO2004055934A1 (fr) 2004-07-01

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FI (1) FI20041076A (fr)
NO (1) NO20045363L (fr)
SE (1) SE0402007L (fr)
WO (1) WO2004055934A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JP2014022180A (ja) * 2012-07-18 2014-02-03 Fujikura Ltd 色素増感太陽電池およびその製造方法

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MD2730C2 (ro) * 2003-08-05 2005-12-31 Институт Прикладной Физики Академии Наук Молдовы Celulă solară fotoelectrochimică
JP2006282983A (ja) * 2005-03-09 2006-10-19 Fuji Photo Film Co Ltd 色素組成物、および染色方法
JP4669754B2 (ja) * 2005-03-09 2011-04-13 富士フイルム株式会社 色素組成物、および染色方法
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JP5487321B2 (ja) * 2010-10-29 2014-05-07 株式会社フジクラ 色素増感太陽電池モジュール
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JP2014022180A (ja) * 2012-07-18 2014-02-03 Fujikura Ltd 色素増感太陽電池およびその製造方法

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